JP2872814B2 - Bearing structure and spindle motor using the same - Google Patents
Bearing structure and spindle motor using the sameInfo
- Publication number
- JP2872814B2 JP2872814B2 JP2416311A JP41631190A JP2872814B2 JP 2872814 B2 JP2872814 B2 JP 2872814B2 JP 2416311 A JP2416311 A JP 2416311A JP 41631190 A JP41631190 A JP 41631190A JP 2872814 B2 JP2872814 B2 JP 2872814B2
- Authority
- JP
- Japan
- Prior art keywords
- pair
- bearing structure
- inner sleeve
- bracket
- preload
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Mounting Of Bearings Or Others (AREA)
- Support Of The Bearing (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、磁気ディスクの如き記
録部材を回転駆動するためのスピンドルモータ及びこれ
に好適に用いることができる軸受構造体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spindle motor for rotationally driving a recording member such as a magnetic disk and a bearing structure which can be suitably used for the spindle motor.
【0002】[0002]
【従来の技術】スピンドルモータは、一般に、駆動装置
のフレ−ムに取り付けられるブラケットと、記録部材が
装着されるハブ部材と、ブラケット及びハブ部材の間に
介在される軸受手段を備えている。軸受手段は、一対の
軸受部材から構成され、かかる一対の軸受部材が所定の
間隔を置いてブラケットとハブ部材の間に配設される。2. Description of the Related Art A spindle motor generally includes a bracket attached to a frame of a driving device, a hub member on which a recording member is mounted, and bearing means interposed between the bracket and the hub member. The bearing means includes a pair of bearing members, and the pair of bearing members are disposed between the bracket and the hub member at a predetermined interval.
【0003】[0003]
【発明が解決しようとする課題】しかしながら、従来の
スピンドルモータでは、軸受手段が一対の軸受部材から
構成されている故に、これら軸受部材を装着するための
作業が煩雑であり、モータの組立工程が多くなり、製造
コストが高くなる問題があった。However, in the conventional spindle motor, since the bearing means is composed of a pair of bearing members, the operation for mounting these bearing members is complicated, and the motor assembling process is complicated. However, there is a problem that the production cost increases.
【0004】本発明の課題は、スピンドルモータに好都
合に適用することができる新規な軸受構造体を提供する
ことである。It is an object of the present invention to provide a novel bearing structure which can be advantageously applied to a spindle motor.
【0005】また、本発明の他の課題は、製造が比較的
簡単で且つ所定の予圧状態を維持することができる優れ
たスピンドルモータを提供することである。Another object of the present invention is to provide an excellent spindle motor which is relatively simple to manufacture and can maintain a predetermined preload state.
【0006】[0006]
【課題を解決するための手段】本発明の軸受構造体にお
いては、円筒状内側スリーブと、該内側スリーブの両端
部外側に配設された一対の短円筒状外側スリーブと、該
内側スリーブの両端部外周面と該一対の外側スリーブの
それぞれの内周面との間に介在された球状部材と、該一
対の外側スリーブの間に介在された予圧付与部材と、を
具備し、該予圧付与部材はリングの一部を切欠いたC字
状でありその外径は該一対の外側スリーブの外径と実質
上同一又はこれより幾分小さく設定され、幅の異なる複
数種の該予圧付与部材のいずれかを選択して該一対の外
側スリーブの間に周方向外方から装着することによっ
て、該球状部材に所定の予圧が付与される。In the bearing structure of the present invention, a cylindrical inner sleeve, a pair of short cylindrical outer sleeves disposed outside both ends of the inner sleeve, and both ends of the inner sleeve. parts outer peripheral surface of the pair of outer sleeve
A spherical member interposed between the respective inner peripheral surfaces and a preload applying member interposed between the pair of outer sleeves, wherein the preload applying member has a C-shape in which a part of a ring is cut away.
The outer diameter of be Jo Resona is somewhat smaller set than the outer diameter substantially the same as or which of the pair of the outer sleeve, the pair of outer by selecting one of a plurality of types of applying the preload members having different widths A predetermined preload is applied to the spherical member by being mounted between the sleeves from the outside in the circumferential direction .
【0007】 また、本発明のスピンドルモータにおい
ては、ブラケットと、該ブラケットに対して相対的に回
転自在で且つ記録部材が装着されるハブ部材と、該ハブ
部材と該ブラケットとの間に介在された軸受構造体とを
具備するスピンドルモータにおいて、該軸受構造体は、
円筒状内側スリーブと、該内側スリーブの両端部外側に
配設された一対の短円筒状外側スリーブと、該内側スリ
ーブの両端部外周面と該一対の外側スリーブのそれぞれ
の内周面との間に介在された球状部材と、該一対の外側
スリーブの間に介在された予圧付与部材と、を備え、該
予圧付与部材はリングの一部を切欠いたC字状でありそ
の外径は該一対の外側スリーブの外径と実質上同一又は
これより幾分小さく設定され、幅の異なる複数種の該予
圧付与部材のいずれかを該一対の外側スリーブの間に周
方向外方から装着することによって予圧付与状態の該軸
受構造体が形成され、該軸受構造体の該内側スリーブが
該ブラケット又は該ハブ部材に固定され、該一対の外側
スリーブが該ハブ部材又は該ブラケットに固定される。In the spindle motor according to the present invention, the bracket, a hub member rotatable relative to the bracket and on which the recording member is mounted, and a hub interposed between the hub member and the bracket. A bearing structure, the bearing structure comprising:
A cylindrical inner sleeve, a pair of short cylindrical outer sleeves disposed outside both ends of the inner sleeve, an outer peripheral surface at both ends of the inner sleeve, and the pair of outer sleeves , respectively;
And a preload applying member interposed between the pair of outer sleeves. The preload applying member has a C-shape in which a part of a ring is cut away. Aliso <br/> outer diameter is somewhat smaller set than the outer diameter substantially the same as or which of the pair of the outer sleeve, the pair of outer sleeves one of a plurality of types of applying the preload members having different widths Lap between
The bearing structure in a preloaded state is formed by mounting from the outside in the direction , the inner sleeve of the bearing structure is fixed to the bracket or the hub member, and the pair of outer sleeves is the hub member or the hub member. Fixed to the bracket.
【0008】[0008]
【作用】かかる軸受構造体は、内側スリーブ、一対の外
側スリーブ、内側スリーブの両端部と一対の外側スリー
ブとの間に介在された球状部材及び予圧付与部材と、を
備え、これら構成要素によってユニットとして構成され
る。それ故に、かかる構造体は、従来の2個の軸受部材
に代えて用いることができ、従ってスピンドルモータに
適用した場合モータの組立が容易になり、また組立工程
が少なくなる。更に、球状部材への予圧の付与は、幅の
異なる複数種の予圧付与部材のいずれかを選択して一対
の外側スリーブの間に介在させることによって行うこと
ができ、従って所定の予圧荷重を正確に付与することが
できる。The bearing structure includes an inner sleeve, a pair of outer sleeves, a spherical member and a preload applying member interposed between both ends of the inner sleeve and the pair of outer sleeves, and a unit is formed by these components. Is configured as Therefore, such a structure can be used in place of the conventional two bearing members, and therefore, when applied to a spindle motor, assembling of the motor is facilitated and the number of assembling steps is reduced. Further, the application of preload to the spherical member can be performed by selecting any one of a plurality of types of preload application members having different widths and interposing between the pair of outer sleeves. Can be provided.
【0009】また、上述のスピンドルモータは、上記軸
受構造体を備え、軸受構造体の内側スリーブがブラケッ
ト又はハブ部材に固定され、一対の外側スリーブがハブ
部材又はブラケットに固定される。従って、モータの構
成が比較的簡単で且つその組立作業が容易であり、従来
に比して容易に製造することができる。Further, the spindle motor includes the bearing structure, wherein an inner sleeve of the bearing structure is fixed to a bracket or a hub member, and a pair of outer sleeves is fixed to the hub member or the bracket. Therefore, the structure of the motor is relatively simple and the assembling work is easy, and the motor can be manufactured more easily than in the past.
【0010】[0010]
【実施例】以下、添付図面を参照して、本発明に従う軸
受構造体及びこれを用いたスピンドルモータの実施例に
ついて説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bearing structure according to the present invention and a spindle motor using the same.
【0011】まず、第1図及び第2図を参照して、本発
明に従う軸受構造体の一実施例を説明する。First, an embodiment of a bearing structure according to the present invention will be described with reference to FIG. 1 and FIG.
【0012】第1図及び第2図において、図示の軸受構
造体1は、中空円筒状の内側スリーブ2と一対の中空短
円筒状の外側スリーブ4及び6を備えている。内側スリ
ーブ2の両端部外周面には環状の収容凹部が設けられて
いる。また、外側スリーブ4及び6の中央部内周面には
環状の収容凹部が設けられている。そして、内側スリー
ブ2の片端部に形成された収容凹部と片方の外側スリー
ブ4の収容凹部の間に複数個の球状部材8が凹部に沿っ
て移動自在に且つ回転自在に装着されている。また、内
側スリーブ2の他端部に形成された収容凹部と他方の外
側スリーブ6の収容凹部の間に複数個の球状部材10が
凹部に沿って移動自在に且つ回転自在に装着されてい
る。かく装着されているので、一対の外側スリーブ4及
び6は、内側スリーブ2の外側にてその両端部に配置さ
れ、一対の外側スリーブ4及び6の間には間隙が存在
し、かかる間隙に後述する如くして予圧付与部材12が
介在される。In FIGS. 1 and 2, the illustrated bearing structure 1 includes a hollow cylindrical inner sleeve 2 and a pair of hollow short cylindrical outer sleeves 4 and 6. Annular receiving recesses are provided on the outer peripheral surfaces of both ends of the inner sleeve 2. Further, an annular accommodation recess is provided on the inner peripheral surface of the central portion of the outer sleeves 4 and 6. A plurality of spherical members 8 are movably and rotatably mounted along the recess between the housing recess formed at one end of the inner sleeve 2 and the housing recess of one outer sleeve 4. A plurality of spherical members 10 are movably and rotatably mounted along the recess between the housing recess formed at the other end of the inner sleeve 2 and the housing recess of the other outer sleeve 6. Because of the mounting, the pair of outer sleeves 4 and 6 are disposed at both ends outside the inner sleeve 2, and a gap exists between the pair of outer sleeves 4 and 6. Thus, the preload applying member 12 is interposed.
【0013】予圧付与部材12はリング状であり、外側
スリーブ4及び6の間に挿入可能なようにその一部が切
欠かれ、全体としてC字状となっている。予圧付与部材
12の外径は外側スリーブ4及び6の外径と実質上同一
又はこれより幾分小さく設定されており、従って、後述
する如く軸受構造体1をスピンドルモータに適用するこ
とがてきる。かかる予圧付与部材12は幅(第1図及び
第2図において左右方向の長さ)の異なる複数種のもの
が製作され、複数種の中から選択された1個が外側スリ
ーブ4及び6の間に装着される。The preloading member 12 has a ring shape and is partially cut away so as to be inserted between the outer sleeves 4 and 6, and has a C shape as a whole. The outer diameter of the preload applying member 12 is set to be substantially the same as or slightly smaller than the outer diameter of the outer sleeves 4 and 6, so that the bearing structure 1 can be applied to a spindle motor as described later. . A plurality of kinds of such preload applying members 12 having different widths (length in the left-right direction in FIGS. 1 and 2) are manufactured, and one selected from the plurality of kinds is provided between the outer sleeves 4 and 6. Attached to.
【0014】外側スリーブ4及び6の外端部には、例え
ば合成ゴムから形成することができる環状シール14及
び16が装着され、また外側スリーブ4及び6の内端部
には、例えば合成樹脂から形成することができる環状シ
ール18及び20が装着されている。環状シール14、
16、18及び20は内側スリーブ2の外周面に近接乃
至接触し、潤滑グリースの外部への飛散及び外部からの
ゴミの侵入を防止する。The outer ends of the outer sleeves 4 and 6 are provided with annular seals 14 and 16 which can be made of, for example, synthetic rubber, and the inner ends of the outer sleeves 4 and 6 are made of, for example, synthetic resin. Annular seals 18 and 20 that can be formed are mounted. Annular seal 14,
The reference numerals 16, 18, and 20 contact or contact the outer peripheral surface of the inner sleeve 2 to prevent the lubricating grease from scattering to the outside and dust from entering from the outside.
【0015】かかる軸受構造体1は、例えば、次の通り
にして組立てることができる。主として第2図を参照し
て、まず内側スリーブ2の一端部に片方の外側スリーブ
4(外側スリーブ4にはシール18が装着されている)
を矢印22の方向に被嵌し、両者の間に複数個の球状部
材8を介在させる。次いで、内側スリーブ2の他端部に
他方の外側スリーブ6(この外側スリーブ6にはシール
20が装着されている)を矢印24で示す方向に被嵌
し、同様にして両者の間に複数個の球状部材10を介在
させる。しかる後、外側スリーブ4及び6を例えば予圧
相当圧で外方向に引っ張り、かく予圧を加えた状態にて
外側スリーブ4及び6の間の距離を測定し、その距離に
見合った幅の予圧付与部材12を選択し、そして矢印2
6で示す方向に予圧付与部材12を挿入する。その後、
グリースを封入し、またシール14、16を所要の通り
取付ける。かくして、第1図に示す通りの軸受構造体1
がユニットとして組立てられ、かく組付けた状態では所
定荷重の予圧が球状部材8及び10に加わっている。球
状部材8及び10に加わる予圧を調整する場合には、容
易に理解される如く、予圧付与部材12を他のものに代
えればよく、予圧を例えば小さく(又は大きく)する場
合には、幅の若干小さい(又は大きい)ものにすればよ
い。The bearing structure 1 can be assembled, for example, as follows. Referring mainly to FIG. 2, first, one outer sleeve 4 is attached to one end of the inner sleeve 2 (the outer sleeve 4 is provided with a seal 18).
Is fitted in the direction of arrow 22, and a plurality of spherical members 8 are interposed between the two. Next, the other outer sleeve 6 (on which the seal 20 is attached) is fitted to the other end of the inner sleeve 2 in the direction indicated by the arrow 24, and a plurality of outer sleeves 6 are similarly placed between the two. Is interposed. Thereafter, the outer sleeves 4 and 6 are pulled outward, for example, at a preload equivalent pressure, and the distance between the outer sleeves 4 and 6 is measured with the preload applied, and a preload applying member having a width corresponding to the distance is measured. Select 12 and arrow 2
The preload applying member 12 is inserted in the direction indicated by 6. afterwards,
Grease is sealed and seals 14, 16 are attached as required. Thus, the bearing structure 1 as shown in FIG.
Are assembled as a unit, and a preload of a predetermined load is applied to the spherical members 8 and 10 in the assembled state. When the preload applied to the spherical members 8 and 10 is adjusted, as will be easily understood, the preload applying member 12 may be replaced with another member. For example, when the preload is reduced (or increased), the width of the preload is reduced. It may be slightly smaller (or larger).
【0016】次いで、第3図を参照して、上記軸受構造
体1を用いたスピンドルモータについて説明する。第3
図において、図示のスピンドルモータ42は、ブラケッ
ト44と、ブラケット44に対して相対的に回転自在で
あるハブ部材46とを備え、ブラケット44とハブ部材
46との間に上記軸受構造体1が介在されている。ブラ
ケット44は略円形状のブラケット本体48を有し、ブ
ラケット本体48の外周部にはフランジ部50が一体に
形成され、かかるフランジ部50が駆動装置のフレーム
(図示せず)に取付けられる。ブラケット本体48の略
中央部には、第3図において上方に突出する円筒状壁5
2が設けられ、かかる円筒状壁52に軸部材54の一端
部56が圧入の如き手段により固定されている。この一
端部56は他端部58よりも外径が幾分大きく、両者の
間には段部60が規定されている。尚、実施例では、軸
部材54に段部60を規定しているが、軸部材54の外
径を実質上変えることなく、ブラケット本体48の円筒
状壁52により段部(当接面)を規定するようにしても
よい。Next, a spindle motor using the bearing structure 1 will be described with reference to FIG. Third
In the drawing, the illustrated spindle motor 42 includes a bracket 44 and a hub member 46 that is rotatable relative to the bracket 44, and the bearing structure 1 is interposed between the bracket 44 and the hub member 46. Have been. The bracket 44 has a substantially circular bracket body 48, and a flange 50 is integrally formed on an outer peripheral portion of the bracket body 48, and the flange 50 is attached to a frame (not shown) of the driving device. At a substantially central portion of the bracket body 48, a cylindrical wall 5 projecting upward in FIG.
2, one end 56 of the shaft member 54 is fixed to the cylindrical wall 52 by means such as press fitting. This one end 56 has a somewhat larger outer diameter than the other end 58, and a step 60 is defined between them. In the embodiment, the step portion 60 is defined in the shaft member 54, but the step portion (contact surface) is formed by the cylindrical wall 52 of the bracket body 48 without substantially changing the outer diameter of the shaft member 54. It may be specified.
【0017】軸受構造体1は軸部材54の他端部に接着
剤の如き手段により固定され、内側スリーブ2の一端が
上記段部60に当接することによって所定位置に位置付
けられる。磁性材料から形成されるハブ部材46は、軸
受構造体1の一対の外側スリーブ4及び6に圧入の如き
手段により固定される。ハブ部材46は、外側スリーブ
4及び6に支持される円筒状のハブ本体62を有し、ハ
ブ本体62の下端部にはフランジ部64が設けられ、か
かるフランジ部64の上面に磁気ディスクの如き記録部
材(図示せず)が載置される。フランジ部64の周縁部
には、下方に延びる環状垂下部66が設けられ、かかる
垂下部66の内周面にロータマグネット68が装着され
ている。また、ハブ本体62の上端部にはキャップ部材
67が装着され、このキャップ部材67によって上記他
端部が密封される。The bearing structure 1 is fixed to the other end of the shaft member 54 by means such as an adhesive, and is positioned at a predetermined position by one end of the inner sleeve 2 abutting on the step portion 60. The hub member 46 formed of a magnetic material is fixed to the pair of outer sleeves 4 and 6 of the bearing structure 1 by means such as press fitting. The hub member 46 has a cylindrical hub body 62 supported by the outer sleeves 4 and 6, and a flange 64 is provided at a lower end of the hub body 62, and an upper surface of the flange 64 is provided with an upper surface such as a magnetic disk. A recording member (not shown) is placed. An annular hanging portion 66 extending downward is provided at a peripheral portion of the flange portion 64, and a rotor magnet 68 is mounted on an inner peripheral surface of the hanging portion 66. A cap member 67 is attached to the upper end of the hub body 62, and the other end is sealed by the cap member 67.
【0018】ロータマグネット68に対向してステータ
70が配設されている。ステータ70は、複数枚のプレ
ートを積層することによって形成されるステータコア7
2とこのステータコア72に巻かれたコイル74を有
し、ステータコア72がブラケット本体48の円筒状壁
52に固定されている。また、コイル74の一端部76
はブラケット本体48に形成された孔78より外部に導
出され、この孔78は接着剤により密封される。A stator 70 is arranged opposite the rotor magnet 68. The stator 70 includes a stator core 7 formed by stacking a plurality of plates.
2 and a coil 74 wound around the stator core 72, and the stator core 72 is fixed to the cylindrical wall 52 of the bracket body 48. Also, one end 76 of the coil 74
Is led out through a hole 78 formed in the bracket body 48, and the hole 78 is sealed with an adhesive.
【0019】上記スピンドルモータでは、コイル74に
電流を所要の通り供給することによって、ステータ70
(これと一体的であるブラケット44、軸部材54及び
軸受構造体1の内側スリーブ2)に対してロータマグネ
ット66(これと一体的であるハブ部材46と軸受構造
体1の外側スリーブ4及び6並びに予圧付与部材12)
が所定方向に回動される。In the spindle motor described above, a current is supplied to the coil 74 as required, so that the
The rotor magnet 66 (the hub member 46 and the outer sleeves 4 and 6 of the bearing structure 1, which are integral with the rotor magnet 66) (the bracket 44, the shaft member 54, and the inner sleeve 2 of the bearing structure 1). And a preload applying member 12)
Is rotated in a predetermined direction.
【0020】かくの通りのスピンドルモータにおいて
は、ブラケット44にステータ70及び軸部材54を装
着し、一方ハブ部材46にロータマグネット68及び軸
受構造体1を装着し、しかる後上記軸部材54に軸受構
造体1の内側スリーブ4を装着すればよく、その組立が
容易で且つ組立工数が従来に比して少ない。In the spindle motor as described above, the stator 70 and the shaft member 54 are mounted on the bracket 44, while the rotor magnet 68 and the bearing structure 1 are mounted on the hub member 46, and then the bearing is mounted on the shaft member 54. What is necessary is just to mount the inner sleeve 4 of the structure 1, the assembling thereof is easy, and the number of assembling steps is smaller than that in the related art.
【0021】以上、本発明に従う軸受構造体及びこれを
適用したスピンドルモータの実施例について説明した
が、本発明はかかる実施例に限定されるものではなく、
本発明の範囲を逸脱するこなく種々の変形乃至修正が可
能である。Although the embodiments of the bearing structure according to the present invention and the spindle motor to which the same are applied have been described above, the present invention is not limited to such embodiments.
Various changes and modifications can be made without departing from the scope of the present invention.
【0022】例えば、図示の実施例では、軸受構造体を
軸固定型のスピンドルモータに適用して説明したが、こ
れに限定されるものではなく、それ自体公知の軸回転型
のスピンドルモータにも同様に適用することができる。
かかる場合、ハブ部材と一体の軸部材が軸受構造体の内
側スリーブに固定され、軸受構造体の一対の外側スリー
ブがブラケットに固定される。For example, in the illustrated embodiment, the bearing structure has been described as applied to a fixed shaft type spindle motor. However, the present invention is not limited to this, and is also applicable to a shaft rotating type spindle motor known per se. The same can be applied.
In such a case, the shaft member integral with the hub member is fixed to the inner sleeve of the bearing structure, and the pair of outer sleeves of the bearing structure are fixed to the bracket.
【0023】[0023]
【発明の効果】本発明の軸受構造体は、内側スリーブ、
一対の外側スリーブ、内側スリーブの両端部外周面と一
対の外側スリーブのそれぞれの内周面との間に介在され
た球状部材及び予圧付与部材と、を備え、これら構成要
素によってユニットを構成する。そして、従来の2個の
軸受部材に代えて用いることができ、スピンドルモータ
に適用した場合モータの組立が容易になり、また組立工
程が少なくなる。更に、球状部材への予圧の付与は、幅
の異なる複数種の予圧付与部材のいずれかを選択して一
対の外側スリーブの間に介在させることによって行うこ
とができ、従って所定の予圧荷重を正確に付与すること
ができる。しかも、予圧付与部材がリングの一部を切欠
いてC字状に形成されているため、これを一対の外側ス
リーブの間に周方向外方より簡単に装着することがで
き、作業性が良好になる利点がある。 The bearing structure of the present invention comprises an inner sleeve,
The unit includes a pair of outer sleeves, a spherical member and a preload applying member interposed between outer peripheral surfaces at both ends of the inner sleeve and respective inner peripheral surfaces of the pair of outer sleeves, and these components constitute a unit. And it can be used in place of the conventional two bearing members, and when applied to a spindle motor, assembling of the motor becomes easy and the number of assembling steps is reduced. Further, the application of preload to the spherical member can be performed by selecting any one of a plurality of types of preload application members having different widths and interposing between the pair of outer sleeves. Can be provided. In addition, the preloading member cuts a part of the ring
And is formed in a C-shape.
It is easier to install between leaves in the circumferential direction.
And there is an advantage that workability is improved.
【0024】また、上述のスピンドルモータは、上記軸
受構造体を備え、軸受構造体の内側スリーブがブラケッ
ト又はハブ部材に固定され、一対の外側スリーブがハブ
部材又はブラケットに固定される。従って、モータの構
成が比較的簡単で且つその組立作業が容易であり、従来
に比して容易に製造することができる。Further, the spindle motor includes the bearing structure, wherein an inner sleeve of the bearing structure is fixed to a bracket or a hub member, and a pair of outer sleeves is fixed to the hub member or the bracket. Therefore, the structure of the motor is relatively simple and the assembling work is easy, and the motor can be manufactured more easily than in the past.
【図1】本発明に従う軸受構造体の一実施例の断面図で
ある。FIG. 1 is a sectional view of one embodiment of a bearing structure according to the present invention.
【図2】図1の軸受構造体を分解して示す断面図であ
る。FIG. 2 is an exploded sectional view showing the bearing structure of FIG. 1;
【図3】本発明に従うスピンドルモータの一実施例の断
面図である。FIG. 3 is a sectional view of an embodiment of a spindle motor according to the present invention.
1 軸受構造体 2 内側スリーブ 4、6 外側スリーブ 8、10 球状部材 12 予圧付与部材 42 スピンドルモータ 44 ブラケット 46 ハブ部材 54 軸部材 66 ロータマグネット 70 ステータ DESCRIPTION OF SYMBOLS 1 Bearing structure 2 Inner sleeve 4, 6 Outer sleeve 8, 10 Spherical member 12 Preload applying member 42 Spindle motor 44 Bracket 46 Hub member 54 Shaft member 66 Rotor magnet 70 Stator
Claims (2)
の両端部外側に配設された一対の短円筒状外側スリーブ
と、該内側スリーブの両端部外周面と該一対の外側スリ
ーブのそれぞれの内周面との間に介在された球状部材
と、該一対の外側スリーブの間に介在された予圧付与部
材と、を具備し、該予圧付与部材はリングの一部を切欠
いたC字状でありその外径は該一対の外側スリーブの外
径と実質上同一又はこれより幾分小さく設定され、幅の
異なる複数種の該予圧付与部材のいずれかを選択して該
一対の外側スリーブの間に周方向外方から装着すること
によって、該球状部材に所定の予圧が付与される、こと
を特徴とする軸受構造体。1. A cylindrical inner sleeve, a pair of short cylindrical outer sleeves disposed outside both ends of the inner sleeve, an outer peripheral surface at both ends of the inner sleeve, and an inner sleeve of each of the pair of outer sleeves . A spherical member interposed between the outer sleeve and a peripheral surface; and a preload applying member interposed between the pair of outer sleeves, wherein the preload applying member has a part of a ring cut away.
The outer diameter of Resona be had C-shaped is somewhat smaller set than the outer diameter substantially the same as or which of the pair of the outer sleeve, the selected one of the plurality of kinds of applying the preload members having different widths A bearing structure, wherein a predetermined preload is applied to the spherical member by being mounted between a pair of outer sleeves from the outside in the circumferential direction .
対的に回転自在で且つ記録部材が装着されるハブ部材
と、該ハブ部材と該ブラケットとの間に介在された軸受
構造体とを具備するスピンドルモータにおいて、該軸受
構造体は、円筒状内側スリーブと、該内側スリーブの両
端部外側に配設された一対の短円筒状外側スリーブと、
該内側スリーブの両端部外周面と該一対の外側スリーブ
のそれぞれの内周面との間に介在された球状部材と、該
一対の外側スリーブの間に介在された予圧付与部材と、
を備え、該予圧付与部材はリングの一部を切欠いたC字
状でありその外径は該一対の外側スリーブの外径と実質
上同一又はこれより幾分小さく設定され、幅の異なる複
数種の該予圧付与部材のいずれかを該一対の外側スリー
ブの間に周方向外方から装着することによって予圧付与
状態の該軸受構造体が形成され、該軸受構造体の該内側
スリーブが該ブラケット又は該ハブ部材に固定され、該
一対の外側スリーブが該ハブ部材又は該ブラケットに固
定される、ことを特徴とするスピンドルモータ。2. A bracket comprising: a bracket; a hub member rotatable relative to the bracket and on which a recording member is mounted; and a bearing structure interposed between the hub member and the bracket. In the spindle motor, the bearing structure includes a cylindrical inner sleeve, and a pair of short cylindrical outer sleeves disposed outside both ends of the inner sleeve.
Outer peripheral surfaces of both ends of the inner sleeve and the pair of outer sleeves
A spherical member interposed between the respective inner peripheral surfaces of the respective , and a preload applying member interposed between the pair of outer sleeves,
Wherein the preload applying member has a C-shape in which a part of a ring is cut out.
The outer diameter of be Jo Resona is somewhat smaller set than the outer diameter substantially the same as or which of the pair of the outer sleeve, between one of a plurality of kinds of applying the preload members having different widths of the pair of outer sleeve The bearing structure in a preloaded state is formed by mounting the bearing structure from the outside in the circumferential direction , the inner sleeve of the bearing structure is fixed to the bracket or the hub member, and the pair of outer sleeves is attached to the hub member. Alternatively, the spindle motor is fixed to the bracket.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2416311A JP2872814B2 (en) | 1990-12-29 | 1990-12-29 | Bearing structure and spindle motor using the same |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2416311A JP2872814B2 (en) | 1990-12-29 | 1990-12-29 | Bearing structure and spindle motor using the same |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04249616A JPH04249616A (en) | 1992-09-04 |
JP2872814B2 true JP2872814B2 (en) | 1999-03-24 |
Family
ID=18524541
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2416311A Expired - Fee Related JP2872814B2 (en) | 1990-12-29 | 1990-12-29 | Bearing structure and spindle motor using the same |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2872814B2 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60172720A (en) * | 1984-02-15 | 1985-09-06 | Nippon Seiko Kk | Pressurized bearing device |
JPH0788849B2 (en) * | 1986-12-26 | 1995-09-27 | 光洋精工株式会社 | Magnetic bearing device |
JPH0266715U (en) * | 1988-10-31 | 1990-05-21 |
-
1990
- 1990-12-29 JP JP2416311A patent/JP2872814B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH04249616A (en) | 1992-09-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5160866A (en) | Spindle motor | |
US5227686A (en) | Spindle motor | |
EP1617094B1 (en) | Small-sized motor and method of manufacturing the same | |
CA1197278A (en) | Stepper motor having rotor with limited axial movement | |
JP3640818B2 (en) | Small motor | |
JP2872814B2 (en) | Bearing structure and spindle motor using the same | |
JPH07208457A (en) | Bearing structural body | |
JP2732313B2 (en) | Spindle motor | |
JP3020616B2 (en) | Spindle motor | |
JP3379885B2 (en) | Stepping motor and manufacturing method thereof | |
JP3827135B2 (en) | Manufacturing method of small motor | |
US5414575A (en) | Magnetic disc drive device with hub and clamper assembly for reducing post-assembly machining | |
JP2844379B2 (en) | Spindle motor | |
JP3558704B2 (en) | Spindle motor | |
JP4724966B2 (en) | motor | |
JP3593374B2 (en) | motor | |
JP2640633B2 (en) | Spindle motor | |
JP3503794B2 (en) | motor | |
JP2951295B2 (en) | Spindle motor | |
JP3050938B2 (en) | Spindle motor | |
JPH0660531A (en) | Spindle mechanism | |
JP2007139031A (en) | Torque limiter | |
JPH04112643A (en) | Spindle motor | |
JP3555752B2 (en) | Capstan motor | |
JPH07293572A (en) | Bearing device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19981124 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090108 Year of fee payment: 10 |
|
LAPS | Cancellation because of no payment of annual fees |